Cai took second place after a final run of 89.20, but the Chinese team was denied a clean sweep of the medal positions when American Maddie Mastro edged ahead of Wu Shaotong, to the ire of Chinese coach Pekka Koskela.

"Wu should have been third today," he said. "It was a split decision, the judges just saw something that wasn't there."

In the men's competition, Scotty James took victory with 97.80, but was pushed all the way by the Japanese duo of Yuto Totsuka and Ruka Hirano, who took second and third places with 95.80 and 92.60 respectively.

Zhang Yiwei, the only Chinese snowboarder in the men's finals, retired hurt after making contact with the edge of the halfpipe, though coach Koskela said Zhang was not seriously injured and would return to competition soon.